I am facing an issue in identify operation for one of the layers(Layer name is Service) in a map service.
Map is loaded on the mapview using the map service (AGSArcGISMapImageLayer)
let basemap = AGSBasemap.streets()
let map = AGSMap(basemap: basemap)
// Map image layer.
let mapImageLayer = AGSArcGISMapImageLayer(url: URL(string: "map service url”)!)
// mapImageLayer.credential = AGSCredential(user: username, password: password)
mapImageLayer.load { [weak mapImageLayer] (error: Error?) in
}
map.operationalLayers.add(mapImageLayer)
// Assign map to the map view.
mapView.map = map
// Add self as the touch delegate for the map view.
mapView.touchDelegate = self
Once the map is loaded, I zoom in to the "Service" feature so that it is visible. On tapping on the feature, the identify operation is performed:
// MARK: - AGSGeoViewTouchDelegate
func geoView(_ geoView: AGSGeoView, didTapAtScreenPoint screenPoint: CGPoint, mapPoint: AGSPoint) {
// Get the geoElements for all layers present at the tapped point.
self.identifyLayers(screenPoint)
}
// MARK: - Identify layers
private func identifyLayers(_ screen: CGPoint) {
self.mapView.identifyLayers(atScreenPoint: screen, tolerance: 22, returnPopupsOnly: false, maximumResultsPerLayer: 10) { (results: [AGSIdentifyLayerResult]?, error: Error?) in
if let error = error {
self.presentAlert(error: error)
} else {
self.handleIdentifyResults(results!)
}
}
}
I am able to get the layer in the results (AGSIdentifyLayerResult) but the geo elements are empty. The Service feature is present at the tap point and is expected to be there in the geo elements array.
// MARK: - Helper methods
private func handleIdentifyResults(_ results: [AGSIdentifyLayerResult]) {
var messageString = ""
var totalCount = 0
for identifyLayerResult in results {
let count = self.geoElementsCountFromResult(identifyLayerResult)
......................
}
.........
}
private func geoElementsCountFromResult(_ result: AGSIdentifyLayerResult) -> Int {
// Create temp array.
var tempResults = [result]
// Using Depth First Search approach to handle recursion.
var count = 0
var index = 0
while index < tempResults.count {
// Get the result object from the array.
let identifyResult = tempResults[index]
// Update count with geoElements from the result.
count += identifyResult.geoElements.count
// Check if the result has any sublayer results.
// If yes then add those result objects in the tempResults
// array after the current result.
if !identifyResult.sublayerResults.isEmpty {
tempResults.insert(contentsOf: identifyResult.sublayerResults, at: index + 1)
}
for sublayerResult in identifyResult.sublayerResults {
print("COUNT- \(sublayerResult.layerContent.name) \(sublayerResult.geoElements.count)")
}
// Update the count and repeat.
index += 1
}
return count
}
In the above code, sublayerResult.geoElements.count is always 0 for the Service layer. For others, I am able to get the geo elements count.
The other layers of similar type (feature layer) and geometry(point) work fine when identify is performed and the features are available in the geo elements.
I am using ArcGIS Runtime iOS v100.9
Does someone face similar issue with any of the layers in a map service? I could not find any solution /work around to fix this issue.
Any guidance is highly appreciated.
Thanks!
